Pt films deposited on MgO (110) and (111) were grown , as a result no elongated features and traces on MgO (110) and (111) were observed . Instead it was seen that a disordered 3 dimensional surface morphology arises. For these Pt thin films, we also observed a nonlinear trend of lattice parameter with respect to substrate temperature. From the above findings what can we observe about it?
If you have a thin film, you may need to run GIXRD.
Keep in mind that X ray will go through the surface, in general, and may show you some data 10 microns depth location from the surface!!
From my point of view, without any image or XRD pattern everything is speculation. Why don't you post a few imaged to visualize the observed effects? How do you deposit? Do you rotate your sample (in case of a directed coating)? How your XRD peaks look like if you observe a change in lattice parameters? How big is the change? Might this be the result of misalignment of the sample? How many peaks you are using for the lattice parameter determination? Gold usually tends to form island. Is this similar for platinum which would explain the non-flat surface? How thick are your coatings? I think that after answering these questions many people could give a more reliable guess.
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